Except those who may require fluid restrictions prevent over hydration—those with severe congestive heart failure, renal failure, or certain severe mental disorders in which polydipsia is a feature—most older adults should have a fluid goal of at least 1,500 mL per day. Careful monitoring is required for symptoms that suggest congestive heart failure: new weight gain, pedal edema, neck vein distension, or shortness of breath. Finding the right amount an older adult should drink per day can be difficult, but it’s important.